# coding=utf-8
import ctypes
import inspect


def _async_raise(tid, exctype):
    """raises the exception, performs cleanup if needed"""
    try:
        tid = ctypes.c_long(tid)
        if not inspect.isclass(exctype):
            exctype = type(exctype)
        res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
        if res == 0:
            # pass
            raise ValueError("invalid thread id")
        elif res != 1:
            # """if it returns a number greater than one, you're in trouble,
            # and you should call it again with exc=NULL to revert the effect"""
            ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, None)
            raise SystemError("PyThreadState_SetAsyncExc failed")
    except Exception as err:
        print(err)
        log_warn(err)


def stop_thread(thread):
    """终止线程"""
    _async_raise(thread.ident, SystemExit)